pydantic's profile picture. The Pydantic Stack: Pydantic Validation, Pydantic AI, Pydantic Logfire, and Pydantic AI Gateway

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The Pydantic Stack: Pydantic Validation, Pydantic AI, Pydantic Logfire, and Pydantic AI Gateway

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Saw this yesterday and immediately spent the night building it out. Built a platform where you input any trading strategy in plain English → it performs research, backtests, and outputs a complete report. Still WIP, it's a pretty basic MVP A few tweaks I added: > Using…

Modern LLMs are good at writing code, but not necessarily at optimizing policy. But you can wrap the LLM in an evolutionary framework, and search for policies. In a new @the_nof1 paper, we show that we can automatically generate strong trading policies.

togelius's tweet image. Modern LLMs are good at writing code, but not necessarily at optimizing policy. But you can wrap the LLM in an evolutionary framework, and search for policies. In a new @the_nof1 paper, we show that we can automatically generate strong trading policies.


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Samuel Colvin is the creator of @pydantic and Pydantic AI. He joins @GregorVand to talk about Pydantic’s origin, type safe AI applications, Pydantic AI’s evolution, LogFire observability, and the future of open-source AI tooling. @samuel_colvin softwareengineeringdaily.com/2025/12/04/pyd…


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Got it working! Not as pretty as Logfire but at least the data is there. I ended up attaching a tracer_provider instead of trying to set the headers.

pamelafox's tweet image. Got it working! Not as pretty as Logfire but at least the data is there. I ended up attaching a tracer_provider instead of trying to set the headers.

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Come and see us at booth 1205 at NeurIPs.

samuel_colvin's tweet image. Come and see us at booth 1205 at NeurIPs.

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Anecdotally, I am receiving much more of that from Chinese companies than western ones. My hypothesis is that they have a different internet culture - focused on large government and large companies and constrastic with small and poor individual "influencers". Not only I'm…

Not sure if I should feel insulted or complimented, but I've started getting asked about paid AI promotions on X. Let's see who starts being breathlessly positive about z.ai and Empromptu soon? 👀 They should know I'm too honest/unstrategic to promote…

samuel_colvin's tweet image. Not sure if I should feel insulted or complimented, but I've started getting asked about paid AI promotions on X.

Let's see who starts being breathlessly positive about z.ai  and Empromptu soon? 👀

They should know I'm too honest/unstrategic to promote…
samuel_colvin's tweet image. Not sure if I should feel insulted or complimented, but I've started getting asked about paid AI promotions on X.

Let's see who starts being breathlessly positive about z.ai  and Empromptu soon? 👀

They should know I'm too honest/unstrategic to promote…


Metronome seems to be down, or at least responding very slowing and not recharging accounts. We may have issues we re-charging for Pydantic AI Gateway Accounts.

Hey @getmetronome, your API requests are taking 13 seconds. Why? Wake up!

samuel_colvin's tweet image. Hey @getmetronome, your API requests are taking 13 seconds.

Why?

Wake up!


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Not sure if I should feel insulted or complimented, but I've started getting asked about paid AI promotions on X. Let's see who starts being breathlessly positive about z.ai and Empromptu soon? 👀 They should know I'm too honest/unstrategic to promote…

samuel_colvin's tweet image. Not sure if I should feel insulted or complimented, but I've started getting asked about paid AI promotions on X.

Let's see who starts being breathlessly positive about z.ai  and Empromptu soon? 👀

They should know I'm too honest/unstrategic to promote…
samuel_colvin's tweet image. Not sure if I should feel insulted or complimented, but I've started getting asked about paid AI promotions on X.

Let's see who starts being breathlessly positive about z.ai  and Empromptu soon? 👀

They should know I'm too honest/unstrategic to promote…

We are proud to be sponsoring @NeurIPSConf this year! Come watch demos from our team at booth 1205. Bonus: we will have live coding sessions with @samuel_colvin

pydantic's tweet image. We are proud to be sponsoring @NeurIPSConf this year! Come watch demos from our team at booth 1205.
Bonus: we will have live coding sessions with @samuel_colvin ✨

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It's well-established for us that using @pydantic - pydantic V2, pydantic-ai, pydantic-settings, etc - leads to higher-quality code from LLMs (types are well-known). But I can swear that the presence of those packages makes the models fundamentally smarter 😀 It's as if they…


👇 checkout typeagent from @gvanrossum at @Microsoft. It has specific support for pydantic logfire 😊

Release 0.3.3 of typeagent. Get it from PyPI (pip install typeagent). Read about it here: github.com/microsoft/type…



At @NeurIPSConf 2025? Come say hello to us at booth 1205.


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Today, I recommended Pydantic and Pydantic AI to a founder who was massively struggling with having deterministic outputs in his startup He was grateful and paid the dinner bill felt good @pydantic @samuel_colvin


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Big fan of your ai gateway, and pydantic-ai library setup is pretty neat So easy to create Multi-agent Workflows and assigning tools


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